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Heater core flush

Heater core flush

lex2oos
Member
138
13-09-2017, 09:10 AM
#1
Hi folks. anyone have this done?
I get very poor heat from my heater and the weather is getting colder each day Sad
cooltant is in correct level, no leaks, air mix servos work fine, everything works.

which method is the best? compressed air or garden hose? are there any chemicals (myb household) to use?

Thanks Wink
lex2oos
13-09-2017, 09:10 AM #1

Hi folks. anyone have this done?
I get very poor heat from my heater and the weather is getting colder each day Sad
cooltant is in correct level, no leaks, air mix servos work fine, everything works.

which method is the best? compressed air or garden hose? are there any chemicals (myb household) to use?

Thanks Wink

Phil01
Posting Freak
2,004
13-09-2017, 09:20 AM
#2
Is it poor heat output or poor air flow??
DO NOT use compressed air, use garden hose.
Is the coolant in the radiator clean because if it is I doubt if your heater matrix is blocked.
Poss probs.
Blocked pollen filter (poor air flow)
Hot/cold air mix flaps, not adjusted/working correctly.
Engine not running at correct temp (thermostat)

1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,
Phil01
13-09-2017, 09:20 AM #2

Is it poor heat output or poor air flow??
DO NOT use compressed air, use garden hose.
Is the coolant in the radiator clean because if it is I doubt if your heater matrix is blocked.
Poss probs.
Blocked pollen filter (poor air flow)
Hot/cold air mix flaps, not adjusted/working correctly.
Engine not running at correct temp (thermostat)


1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,

lex2oos
Member
138
13-09-2017, 09:28 AM
#3
poor heat. air flow is normal.
why compressed air is bad?
coolant is not very clean. I dont know what prevous owner did put in there, but it looks like sh**.
cabine air filter is fine, replaced recently
are they adjustable?
engine temp is ok. if thermostat is bad, you get hot air when standing and cold when driving. mine does opposite. cooler when standing and warm when driving (more flow i guess)
lex2oos
13-09-2017, 09:28 AM #3

poor heat. air flow is normal.
why compressed air is bad?
coolant is not very clean. I dont know what prevous owner did put in there, but it looks like sh**.
cabine air filter is fine, replaced recently
are they adjustable?
engine temp is ok. if thermostat is bad, you get hot air when standing and cold when driving. mine does opposite. cooler when standing and warm when driving (more flow i guess)

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